9) Sketch a diagram of an atomic absorption spectrometer. Label the nebulizer, light source (be specific), monochromator, and detector. Describe the purpose of each portion of the instrument.
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- The following calibration data were obtained by an atomic absorption spectrophotometric (AAS) method for the determination of mercury in an herbal product. (show complete solution) 1. What is the detection limit for the method? 2. What is the limit of quantitation for the method?Describe the basic design difference between a spectrometer for absorption measurements and one for emission studies?Consider the analysis of a sample of iron using atomic absorbance spectroscopy. Which of the following statements are true? Select all that apply. The iron sample is aspirated into the flame, where the solvent evaporates and the iron analyte is atomized. The hollow-cathode lamp for iron emits wavelengths of light unique for iron. A detector measures the amount of light generated by the flame and not absorbed by iron. The iron atoms in the flame absorb some of the light emitted from the hollow-cathode lamp. The flame replaces the cuvet of conventional spectrometers and the flame pathlength is typically 10 cm.
- You have been asked to determine which heavy metals, if any are in a sample of sewage sludge. Why is atomic absorption spectroscopy not a good technique for the job and why is ICP- atomic emission spectroscopy a better choice?A calibration curve is made for the absorbance as a function of concentration of blue dye (in mg/L). The slope of the curve is 0.131; the y-intercept is -0.01869; the correlation is 0.993. If a consumer sample has an absorbance of 0.120 on the same instrument, what is its concentration of blue dye, in mg/L? a. 0.034 b. 0.935 c. 0.993 d. 1.06An acceleration voltage of 15.0 kV is used to accelerate ions into the 1.48 m flight tube of a time-of-flight (TOF) mass spectrometer. The frequency at which spectra can be recorded is dependent on how long it takes the slowest ion to travel from the source to the detector. If you wish to scan up to m/z 13039, at what frequency (spectra/s) could spectra be recorded if a new spectrum begins each time the slowest ion reaches the detector? frequency: spectra/s
- Atomic Spectroscopy (a) In terms of spectral shape, how are atomic spectra different from molecular spectra? What is the source of this difference? (b) Describe the decision-making process for picking a line for atomic emission analysis of a given analyte. (c) For quality assurance, spike recovery is not sufficient to establish confidence in an analytical procedure. Explain this statement. What should be done instead to demonstrate satisfactory performance of an instrumental method (including elemental analysis). (d) Find a literature example of atomic spectroscopy used for elemental analysis. State the operating conditions with sufficient detail to reproduce the analysis; Please answer very soon will give rating surely All questions complete Answer needed Please help meKiko wants to determine the concentration of an unknown solution which produces a green solution. However, the spectrophotometer he uses doesn't have a function to determine the analytical wavelength of the solution. What is the most probable analytical wavelength he can use for the experiment? Refer to the color wheel below.A student prepared a calibration curve by measuring of the absorbance of five standard solutions of a compound at 300 nm. A cuvette with a path length of 5 cm was used . if the slope of the curve was 300 L/mol. the molar absorptivity of the compound is…….. 60 L mol-1cm-1 1500 L mol-1cm-1 0.20 L mol-1cm-1 5.0 L mol-1cm-1
- The nickel level in a soil sample was determined using AAS. A 3.0 g sample was dissolved in acid and then diluted to a total volume of 100.0 mL. The absorbance of this solution determined at a wavelength of 232 nm, was found to be0.3. Several standard solutions were tested under the same conditions and a calibration curve shown below was obtained. Calculate the mass of nickel in mg.What is affinity elutionB. Quantitative Spectroscopy Prepare two graphs, %T vs. Concentration and Absorbance vs. Concentration, using the data for the cobalt standards. The concentrations of Cobalt standards 2-4 can be calculated using simple dilution calculations. Concentration should be on the x-axis for each of these graphs. The first should clearly show some curvature while the second should be a linear curve. Using the absorbance graph you can determine the concentration of the unknown. Take the absorbance value for the unknown and find that value on the y-axis. Draw a horizontal line from that point on the y-axis to the plotted line. From the point where the horizontal line intersects the plotted line, draw a vertical line straight down to the x-axis. Record the value from the point where you hit the x-axis as the unknown concentration.